package com.ruoyi.oar.api.util;


import cn.hutool.json.JSONObject;
import org.springframework.beans.factory.annotation.Value;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Calendar;
import java.util.List;
import java.util.Map;

/**
 * 获取token类
 *
 * token过期处理 2018.10.24 16:34 参考官方jar
 */
public class AuthServiceUtil {
    //百度OCR识别配置
    public static String  BAIDU_CLIENT_ID="wja6VYlNO1Kh6Mz8aOm65w2G";
    public static String  BAIDU_CLIENT_SECRET="mPhdv2dMftzAYhQK1LFKQhtMnGGNKyrU";

    @Value("${baidu.clientId}")
    public void setClientId(String clientId) {
        BAIDU_CLIENT_ID = clientId;
    }

    @Value("${baidu.clientSecret}")
    public void setClientSecret(String clientSecret) {
        BAIDU_CLIENT_SECRET = clientSecret;
    }

    /**
     * 判断token是否过期
     */
    private static Calendar expireDate = null;
    private static boolean flag = false; // 是否已经获取过了

    public static Boolean needAuth() {
        Calendar c = Calendar.getInstance();
        c.add(5, 1); // 当前日期加一天
        return Boolean.valueOf(!flag || c.after(expireDate));
    }

    /**
     * 获取权限token
     *
     * @return 返回示例： { "access_token":
     *         "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     *         "expires_in": 2592000 }
     */
    public static String getAuth() {
        // 官网获取的 API Key 更新为你注册的
        String clientId = BAIDU_CLIENT_ID ;//"wja6VYlNO1Kh6Mz8aOm65w2G";
        // 官网获取的 Secret Key 更新为你注册的
        String clientSecret = BAIDU_CLIENT_SECRET;//"mPhdv2dMftzAYhQK1LFKQhtMnGGNKyrU";
        return getAuth(clientId, clientSecret);
    }

    /**
     * 获取API访问token 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param clientId  - 百度云官网获取的 API Key
     * @param clientSecret - 百度云官网获取的 Securet Key
     * @return assess_token
     */
    private static String getAuth(String clientId, String clientSecret) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + clientId
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + clientSecret;

        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("POST");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            //System.err.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.getStr("access_token");
            return access_token;

        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }


}
